612309 has 8 divisors (see below), whose sum is σ = 832032. Its totient is φ = 400400.

The previous prime is 612307. The next prime is 612317. The reversal of 612309 is 903216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612309 - 2¹ = 612307 is a prime.

It is a super-2 number, since 2×612309² = 749844622962, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1767 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (104004).

2⁶¹²³⁰⁹ is an apocalyptic number.

It is an amenable number.

612309 is a deficient number, since it is larger than the sum of its proper divisors (219723).

612309 is a wasteful number, since it uses less digits than its factorization.

612309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 612309 is about 782.5017571865. The cubic root of 612309 is about 84.9161341200.

The spelling of 612309 in words is "six hundred twelve thousand, three hundred nine".